1 /* 2 * Copyright (C) 2013 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Neither the name of Google Inc. nor the names of its 11 * contributors may be used to endorse or promote products derived from 12 * this software without specific prior written permission. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef EventPath_h 28 #define EventPath_h 29 30 #include "core/events/EventContext.h" 31 32 #include "wtf/OwnPtr.h" 33 #include "wtf/Vector.h" 34 35 namespace WebCore { 36 37 class Event; 38 class EventTarget; 39 class Node; 40 41 enum EventDispatchBehavior { 42 RetargetEvent, 43 StayInsideShadowDOM 44 }; 45 46 class EventPath { 47 public: 48 explicit EventPath(Event*); 49 explicit EventPath(Node*); 50 void resetWith(Node*); 51 52 EventContext& operator[](size_t index) { return m_eventContexts[index]; } 53 const EventContext& operator[](size_t index) const { return m_eventContexts[index]; } last()54 const EventContext& last() const { return m_eventContexts[size() - 1]; } 55 isEmpty()56 bool isEmpty() const { return m_eventContexts.isEmpty(); } size()57 size_t size() const { return m_eventContexts.size(); } 58 shrink(size_t newSize)59 void shrink(size_t newSize) { m_eventContexts.shrink(newSize); } 60 61 static Node* parent(Node*); 62 static EventTarget* eventTargetRespectingTargetRules(Node*); 63 64 private: 65 EventPath(); 66 at(size_t index)67 EventContext& at(size_t index) { return m_eventContexts[index]; } 68 69 void addEventContext(Node*); 70 71 void calculatePath(); 72 void calculateAdjustedTargets(); 73 void calculateAdjustedEventPathForEachNode(); 74 75 Vector<EventContext, 64> m_eventContexts; 76 Node* m_node; 77 Event* m_event; 78 }; 79 80 } // namespace 81 82 #endif 83